Frankfort Square is an unincorporated community and census-designated place (CDP) in Will County, Illinois, United States. Per the 2020 census, the population was 8,968.
Geography
Frankfort Square is located at .
According to the United States Census Bureau, the CDP has a total area of , all land. It is bordered by Frankfort to the south, Tinley Park to the north and Matteson (in Cook County) to the east.